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<table width="100%" summary="page for tobin"><tr><td>tobin</td><td align="right">R Documentation</td></tr></table>

<h2>Tobin's Tobit data</h2>

<h3>Description</h3>


<p>Economists fit a parametric censored data model called the
&lsquo;tobit&rsquo;.  These data are from Tobin's original paper. 
</p>


<h3>Usage</h3>

<pre>tobin</pre>


<h3>Format</h3>


<p>A data frame with 20 observations on the following 3 variables.
</p>

<dl>
<dt>durable</dt><dd><p>Durable goods purchase</p>
</dd>
<dt>age</dt><dd><p>Age in years</p>
</dd>
<dt>quant</dt><dd><p>Liquidity ratio (x 1000)</p>
</dd>
</dl>



<h3>Source</h3>


<p>J Tobin (1958),
Estimation of relationships for limited dependent variables.
<EM>Econometrica</EM> <B>26</B>, 24&ndash;36.
</p>


<h3>Examples</h3>

<pre>
tfit &lt;- survreg(Surv(durable, durable&gt;0, type='left') ~age + quant,
                data=tobin, dist='gaussian')

predict(tfit,type="response")

</pre>


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